Taping machine



April l2, 1955 w. J. CALDWELL 2,705,973

. TAPING MACHINE Filed Feb. 17. 195o 11 sheets-sheet 1 INVENToR.

ESV E Was/zing on J. Ca/dWe/l W. J. CALDWELL TAPING MACHINE April 12,1955 l1 Sheets-Sheet 2 Filed Feb. 17, 1950 April 12, 1955 w. J. CALDWELLTAPING MACHINE 1l ShetS-Sheet 3 Filed Feb. 17. 1950 JJZ 3,2 3l cfm aku/1JNVENTOR. Wash/gran J. Ca/dwe/l April 12, 1955 w. J. CALDWELL 2,705,978

TAPING MACHINE Filed Feb. 1'7, 1950 11 Sheets-Sheet 4 INI \Ml sea INVENTOR. Wash/gran J faldwd/ April l2, 1955 w. J. CALDWELL TAPING MACHINE 1lSheets-Sheet 5 Filed Feb. 17, 1950 INVENTOR. Wash/gran J ca/awef/ April12 1955 w. J. CALDWELL 2,705,978

TAPING MACHINE Filed Feb. 17. 1950 11 Sheets-Sheet 6 Wash/@fan .xca/dwef/ April 12, 1955 Vw. ,1. CALDWELL TAPING MACHINE l1 Sheets-Sheet7 Filed Feb. 17. 1950 INENTOR. Washington J. Caldwell April 12 1955 w.J. CALDWELL. 2,705,978

TAPING MACHINE Filed Feb. 17, 195o 11 sneets-Sheee L IN V EN TOR. 226) WWash/hg fan J. ca/dwe/f "April 12, 1955 w. J. CALDWELL 2,705,978

TAPING MACHINE Filed Feb. 17, 1950 l1 Sheets-Sheet 9 IN VEN TOR.Washington J. Ca/dn/el/ April 12, 1955 w. J. CALDWELL 2,705,978

TAPING MACHINE i Filed Feb. 17, 1950- y 1l Sheets-Sheet l0 INVENTOR.Wasb/'ngoq J. Cb/dWe/l April 12, 1955 Filed Feb. 17, 1950 W. J. CALDWELLTAPING MACHINE 1l Sheets-Sheet 1l F 1 C, IIIIOIII INVENTOR. Wash/'ng fonJ. C'd/dn/e/l United States Patent 1Q TAPING MACHINE lWashington J.Caldwell, Toledo, Ohio Application February 17, 1950, Serial No. 144,785

. Claims. (Cl. 140-1) This invention relates to coil winding methods andto machines embodying such methods. More particularly it relates to themethod of anda machine for winding armature coils for automotivegenerators which are automatically taped and ready to be positioned inthe slots of the armature.

This invention contemplates the provision of a coil winding machine forwinding form-wound coils for use in the armature slots of an automotivegenerator, the coils being fully prepared for immediate use as the nextstep in a production line to be positioned in its nal position in thearmature. To accomplish this purpose, tape is automatically positionedin at least three positions on the coil sides, while the coil is stillin the winding form, so as to hold the coil in its desired form until itisnally positioned on the generator armature.

The invention further contemplates the provision of a method ofmanufacturing armature coils for use with an automotive generator whichis complete in one step and which can be embodied in a machine which is`capable of automatic operation on a production line.

It is a principal object of this invention to provide an automaticmachine which winds armature coils for use with an automotive generatorfrom continuous strands of wire which are form-wound and provided withholding means in the form of encircling bands `of tape positioned on thecoils While still in the winding form of the machine, so that when thecompleted coil is automatically removed from the machine, it is suitablefor immediately positioning in the slots of the generator armature in aproduction line.

Other objects and advantages of this invention relating to thearrangement, operation and function of the related elements of thestructure, to various details of construction, to combinations of partsand to economies of manufacture, will be apparent to those skilled inthe art D upon consideration ofV the following description and appendedclaims, reference being had to the accompanying drawings forming a partof this specification wherein like reference characters designatecorresponding parts in the several views.

Referring to the drawings:

Fig. I is a plan view of a completed coil Wound by the method to bedisclosed hereinafter as it is automatically issued bythe machineincorporating the method; y

Fig. Il is a perspective Vview of the machine looking at on'e sidethereof;

Fig. III is a perspective view of the machine lookin from the left ofFig. II, one portion of the machine having been removed for clarity; l

Fig. IV is a plan view showing the principal driving elements of themachine with the winding form in open position;

Fig. V is a perspective view of the driving elements which move thetaping device into cooperative relation with the winding form;

Fig. VI is a perspective view of the driving elements tvhich actuate thetape-controlling elements of the taping evice;

Figs. VII, VIII, and IX are perspective 'views of the details of thecomplete taping device in various operating positions;

Figs. X andlXI are elevational views of the winding form locking devicein rotating and locking positions respectively; l

Fig. XII is an elevational view of the wire tensioning and guidingdevice;

' ready for immediate use in a production line for fthe operation ofpositioning the coil in the slots of the genrice Fig. XIII is aperspective view of the locking device for the ends of the wire strands;

Figs. XIV, XV, XVI, and XVII are elevational views ofthe locking devicefor the ends of the wire strands showing the sequence of locking andunlocking;

Fig. XVIII is a plan view of the wire positioning and cutting devicerelative to the locking device with its driving means;

Fig. XIX is a plan view of the wire positioning and cutting device inretracted position for the winding portion of the cycle;

Fig. XX is an elevational View taken along line XX-XX of Fig. XIX;

Fig. XXI is a plan view of the wire positioning and cutting device inadvanced position where the wire strands are fitted into the lockingdevice with the Wire cutters in position for severing the completed coilfrom the strands of wire;

Fig. XXII is a plan view similar to XXI with the wire cutter in actuatedposition after cutting the completed coil free;

Fig. XXIII is a plan View of a detail which shows the completed coilbeing removed from the opened winding form; t

Figs. XXIV, XXV, and XXVI show the various operative positions of thedriving relations of the driving means for the taping device shown inFig. VI;

Figs. XXVII, XXVIII, XXIX, XXX, XXXI, XXXII, and XXXIII are plan views,partly in section, of the cooperative relation between the taping deviceand the winding form, showing the operational sequence in a series ofsteps in the separate figures;

Fig. XXXIV is a sectional view of a fully taped coil i taken at thepoint where tape has been applied;

Fig. XXXV is a perspective view of the tape cutter as detached from thetaping device;

Figs. XXXVI, XXXVII, and XXXVIII are plan views of the tape cutter andits actuating mechanism showing its action by steps;

Figs. XXXIX and XXXX are plan views, partly in section, of a detail ofthe tape advancing and locking device;

Fig. XXXXI is a sectional elevation taken along the line XXXXI-XXXXI ofFig. XXXIX, and

Fig. XXXXII is a timing plan of the cam action of the elements of themachine.

The invention disclosed herein relating to methods of winding armaturecoils for automotive generators and machines ,incorporating suchmethods, is an improvement of the method and machine disclosed in PatentNo. 2,154,792, issued to Karl I-I. Weber on April 18, 1939.

Referring now to the drawings, particularly to Figs. II and III, andcomparing the disclosure of these figures t to the disclosures in theaforementioned Weber patent,

it will be apparent that the mechanism for rotating and controlling thecoil form, the coil form itself, the wire controlling and cutting meansand their driving means are substantially the same as shown in thepatent and there is. no need to describe these elements in full detailas reference can be made to the disclosure of the aforementionedpatent.` Like reference numerals have been applied where such could beutilized for clarity. The principal difference between the Weberdisclosure and the disclosure of the present invention lies in theapplication of a holding means for the completed coil, which, in theWeber patent, consists of holding clips which are subsequently removedmanually when an operator positions tape on the coil by manual means,Whereas, in the present method disclosed herein, the tape isautomatically applied by the machine before the coil is removed from thewinding form so as to obviate completely the manual operationshereinbefore necessary Vbefore the' completed coil was suitable for usein the fabrication of the generator armature. In the coil as it issuedfrom the machine described herein, the tape is already applied` J.

and the completed coil as it issues from the machine is.

The machine disclosed in the Weber patent has been'.

modified by substituting for the clip-attaching mecha'- nism, which hasbeen ren'tovcd entirely, a taping mechanism `which applies three'sections of tape, two sections on one coil side with the third sectionon the opposite coil side, as shown in Figs. I and XXXIV, while the coilis vstill in ythe winding form so that when the completed coil isremoved from the machine by opening the coil winding form withdisplacement of the tail stock, it is ready for immediate use withoutfurther manual operations such as were necessary with the Weber machine.The changes necessary in the machine to accomplish these purposes andobjects will be described in detail hereinafter.

For la clearer understanding of the method and the machine incorporatingthe method, the cycle of operation will be set forth in the beginning,disclosing the basic elements of 'the machine common to both as shown inthe Weber patent and the machine as modified in the present disclosure.Thereafter the taping mechanism will be disclosed and the -new cycle ofoperation will -be set forth.

The wire used in forming the coils is supplied to the machine in spoolswhich are mounted adjacent thereto in any convenient manner, the wirestrands W being led from .the spools to the wire straightening andtensioning devices as shown in Fig. XII. Positioned between the wirestraightening devices and the winding form F, an upwardly projecting armA is provided to direct the wire from the wire straightening device intothe winding form F, preferably at a steep angle by leading the wire fromthe top of two pulleys to the clamping devices on the head piece of thewinding form as shown in Figs. XVII and XIV.

yThe number of wires used in the winding operation for forming the-coils is optional. A multiplicity of wires is preferablyused, dependingupon the design of the armature in which the completed coils are to beincorporated. In the drawings, a -coil having two wires has 'beenVillustrated in connection with Vthe automatic machine dis- 'GlOASeCLThe main shaft 40A of the machine with the incorpor'ated winding form Fis driven directly from the primary power fsource by a driving belt(Fig. IV), intermittent rotation of the winding form being obtained bythe use of a saw-tooth clutch U. The countershaft 41 is driven by a geartrain from the constantly rotating drive portion of the saw-tooth clutchand rotates preferably one revolution vfor twelve revolutions of thedriver .por-tion. Positioned on the countershaft 41 are cam means whichactuate the various supplemental devices cooperating with the windingform F to obtain full automatic operation of the machine which maythereby Voperate steadily with no special attention of an operator otherthan to replenish the source of materials, without which the machine isinoperative, for example, the wire ctc. The time relations between themain shaft andthe countersh'aft during the cycle of operation 4are basedupon the speed ratio as determined by the interconnecting gear trainpositioned in a gear box, while the sequential operation of thesupplemental devices cooperating with 'the winding form is attained bythe 'angular Idisplacement betweenthe various cams of the 'cam drum 67mounted on 'the countershaft di.

vtr'lssun'iifng for convenience in description that the, cycle ofoperation of the'autornatic coil winding 4m'af chine beg'in's with thewinding `form F in open condi.- t-i'on, a description of the sequentialoperation of a 'complete cycle lin the winding coil will be given. Withthe winding form F open, the automatic coil winding machine has releasedthe just wound coil from the winding form by Vthe longitudinal movementof the tail piece on the sh'aft portion 40B, the coil C being heid inform by strips of attached tape T, as is best seen in Fig. I, which isaccomplished by a mechanism which will be described in 'fur-ther `detailhereinafter. The leading ends of `the wires'W are tightly held in theclamping mechanismen the head piece, as is best illustrated in Fig.XIII.

- The cam path 68 on the periphery of the cam drum 67 moves Vthe tailpiece from its cooperative relation with the head -piece which willallow the removal of the completed coil. The head piece, during thisportion of the operative cycle, is held Vinlocked position bythel'ockin'g mechanism shown generally in Figs. X and XI. The saw-toothclutch is disengaged just prior to the operation of thelockingmechanism, so that the head piece may be rigidly held in uprightposition. The countershaft el,

rotating continuously lo the speed of the driver portion vof thesawtooth clutch, causes Ythe cam'path 68 to move .mechanism shown inFigs. X and XI is released at this time by the cam rider 57 contactingthe low portion of the cam to retract the bar 56 and disengage theprojection 56A from the slot 58. Simultaneously, the driven portion of.the saw-tooth clutch U is released by the cam lever 50 and itsresilient means shifts it into engaging relation with the driverportion, so that the winding form F will begin to rotate. The head pieceand tail piece rotate together, the driving force being transmitted fromthe head piece to the tail piece by a locking pin therebetween.

The initial pull of the lhead piece on the lleading ends of the wires Wydisplaces the clamp block 92 -approximately degrees about its Apivotagainst the pull ofthe spring 95 to the-position shown substantially inFigs. XV and XVI. The wires W issuing from the pulleys on thel arm A toa clamp block 92 on the head piece are slightly displaced from thewinding vplane of the winding form and during the iirst 90 degrees ofrotation, the wires are guided into the winding form F by contacting thechamfered smooth edges of the lateral projection 80A on the head piece-(Fig. XIII). Thereafter the wires will smoothly wind into the form fora predetermined nun*- ber of turns from the pulleys withoutinterference.

After the predetermined number of turns have been wound into the form(not necessarily the total number of turns to complete the coil), theleading end of the wire is released from the clamp block 92 on the headpiece by the action yof finger (as `shown in Fig. XVI) contacting themovable portion 97 of the clamp. The countershaft 4l rotates to bringthe 'linger 105 into the path Vof rotation of the movable portion 97 ofthe clamp, so that the resulting impact between the parts will displacethe movable portion in a clockwise direction about its pivot. Thisaction releases the grip of the clamping jaws on the leading end of thewire and completely frees the leading end of the wire from the headpiece. The coil may not unwind even though its end is free because `thesubsequently-wound turns overlap the iirst turn and prevent it frombeing displaced.

The form F continues its rotation in the interim until the requirednumber of turns have `been wound into the form to complete the windingportion of the cycle. The clamp block 92, no longer influenced by thepull `of the leading wires o'f the coil, is snapped back to its originalposition by the action of the resilient means 95 and by the centrifugalforce of rotation of the head piece 'to the position shown in Fig. XVII.In this position, the clamp block v92, with its jaws open under theinfluence of the resilient means after being unlocked, cooperates withthe clamping and wire cutting mechanisms whose actions are to bedescribed hereinafter.

After the 'full number of 'turns have been wound into the winding vform,Athe cam lever 50, cooperating -with cam 51 on the counter shaft 41andthe locking mechanism vshown 'in Figs. 'X and XI, again operates todisengage the saw-tooth clutch U and to lock the khead piece in uprightposition Aas -already described. Thus the head piece `andthe clamp blockI92 are in proper position to cooperatel with the clamping and cuttermechanisms. The position of the Wires W is defined by the 'upperleft-hand corner of the winding form (Fig. XlV) and the pulleys on the.guide varm A, so that they are substantially aligned with the bightofthe cutting shears (Fig. XX) on the moving head `H andthe 'spacebetween thc clamp jaws 96 and 97 (Fig. XIII).

-Cam rider 11S (Fig. XVIII), cooperating with the cam path 119 on thedrum 67 atthis time, advances the cutter head H toward the head piece bythe lever mechanism, the cutter 'head H moving in substantially paralleljuxtaposition with "the main shaft 40. This' advances three elementsinto cooperative relation with the head piece-namely, 'the guide G, thecutter shears, and iinger 3'5, asshow-n in Figs. XIX, XX, XXI, and XXII.The guide lG projects slightly further in the direction of theheadpiec'e than the cutting shears and Lis fitted -with cam surfaces onits forward edge to collect the wires `W into the notch N which alignsthe wires W with the gap between the jaws of the clamping device. Theguide G is spaced relatively above the clamping jaws, while the cuttershearsare spaced relatively below the clamping jaws, both beingpositioned along the line of the wires W issuing from the winding formto the pulleys on the upper end of projecting guide arm A. The aligningaction of the guide G, therefore, positions the wires W in the bight ofthe cutting shears for the cutting operation of the trailing end of thecompleted coil and also in the clamping mechanism in the space betweenthe clamping jaws thereof to allowV a new grip to be obtained by theclamping mechanism on the leading end of the next consecutive coil to bewound. The guide G has a further function to displace the wires from theplane of the winding form to the plane of the clamp block 92 as isclearly shown in Fig. XXI which shows the head H in its maximum forwardposition of displacement. The movement of the guide G and cutter headislimited by contact with the head piece.

Simultaneously, with the forward movement of the guide G, the bell-crank99 is actuated by the cam 104 positioned for rotation on thecountershaft 41. When the wires W are positioned between the clampingjaws of the block 92 by the guide G, the movable element 97 of theclamping device is displaced downwardly by the block on the bell-crank99 to close the jaws thereof and grip the wires securely. The movementof these parts is clearly shown in Fig. XIV, the adjustable block on theupper end of the bell-crank contacting the element 97 to accomplish theclamping action. This gives the head piece a grip on both the trailingend of the coil, already wound, and the leading end of the nextconsecutive coil to be wound.

The wire cutters are also being actuated in this period and theseverance of the trailing end of the coil Vjust wound, is timed to beslightly Ibefore the actuation of the clamping jaws by the bell-crank99, which frees the just-wound coil from the continuous wire strands andprepares the coil for removal from the winding form. However, before thecoil can be removed from the winding form, securing means must bepositioned on the coil sides to hold the coil in shape, which otherwisewould unwind upon the opening of the winding form F. The securing meansare in the form of three short pieces of tape T positioned automaticallyon the coil sides by a mechanism to be described in detail hereinafterand as clearly shown in Fig. I.

For a clearer understanding of the timing relations of the parts of themachine already described and as set forth in detail in the hereinbeforementioned Weber patent, reference is made to Fig. XXXXII which shows bya series of carefully labeled graphs drawn with reference to the degreesof revolution of the cam shaft 41 the timing'relation of the variouselements of the automatic machine disclosed. It will be noted that thegraphs start with the beginning of rotation of the coil form F which isthe start of the winding period of the coil, this position being assumedto be the zero position of the countershaft 41 carrying the variouscams.

Examination of these graphs shows that the winding of the coil begins atpoint 17 at zero degrees, with the saw-tooth clutch U in engagement toform the driving relation, such engagement being had through about 100of rotation as shown in the second graph titled clutch cam, at whichtime the winding form stops rotation. Referring to the graph titled WireClamp Trip, it will be noted that the leading end of the coil just beingwound is released at 100 of rotation of the countershaft. The winding'form and its driving means rotate with reference to the countershaft inthe ratio of to 1 as already set forth. The locking bar 56 is thenpositioned in the slot 58, as shown in the graph titled Locking Bar, andremains in locked position from approximately 120 of rotation toapproximately 340 of rotation of the countershaft. The locking occursafter the winding period is completed and holds the winding form in up`right position for the period of time in which the leading end of thewire strands are reclamped in the block 92; the trailing end of the coiljust wound is severed below the block 92, andthe tape elements T arepositioned on the coil side by the automatic mechanism to be describedin detail hereinafter.

Referring now to the first graph of Fig. XXXXII titled Tape Feed andTape Wrap, it will be noted that 6 the movements of this mechanism aretimed during both the' coil windlng period and also thereafter, whichcan conveniently be divided-into two periods divided by the stopping ofthe coil winding form F which occurs aty 108 of rotation as shown by thedotted vertical line across all ofthe graphs. The period from 0 to 108may be considered as a preparatory phase, during which time the coil isbeing wound and no coperation is had therewith, while the period from108 to 200 may be considered as the attachment phase in which the shortpieces of tape are aiixed to the sides of the coil which is stationaryafter 108 of rotation.

After the completion of the preparatory phase before 108 of rotation,the machine elements utilized for the taping step are separated from thecoil form F which is then rotating in its coil winding phase to becompleted at the 108 point, while after the 108 of rotation'of thecountershaft, the machine elements utilized for the taping step aremoved into cooperative relation with the stationary winding form F forthe completion of the attachment phase. The timing of this phase of themachine elements is shown in the graph entitled Taping Frame, whichclearly shows the establishment of the cooperative relation with thewinding form F as beginning at about of rotation and continuing to about220. during which the tape elements T are attached to the coil. After220 the cooperative relation is fully broken with the winding form F andthe elements again enter the preparatory phase which essentiallyconsists of a period of time in which the tape is removed from a rolland prepared for attachment to the fully wound coil.

There will now be described the machine elements for applying. the tapeelements T to the coil. Referring again to Fig. IV, the cam element 300,which has an internal cam 51 already referred to in connection with thesaw-tooth clutch U which is opened and closed by the actuating of thecam lever 50 by the cam 51, is mounted on a shaft 302 juxtaposed inparallel relation with the countershaft 41 to have the cam element 200cooperate with an external cam surface 304 integral with the elementwhich forms the internal cam 51 mounted for rotation with thecountershaft 41. Refer also now to Fig. VI where these elements areshown in separate relation for clarity. The shaft 302 is journaled inany convenient manner for rotation through a small angle to actuatelevers 306 and 308 mounted on its ends, as is seen in part in Fig. VIand also in Fig. IV. Lever 308 actuates a pair of spaced pusher elements310 and 312 directly while the lever 306 actuates similar spacedelements 314 and 316 on the opposite side of the machine through link31S which actuates the shaft 320 by the arm 322 attached to its end,which then actuates the elements 314 and 316 by an arm 324 fixed to theshaft 320 carrying the elements 314 and 316. Essentially the elements310 and 312 are the same as the elements 314 and 316 operating fromopposite sides of the machine and moving toward each othersimultaneously as will be further described hereinafter. Lever 308 andarm 324 are similar, in that they mount the separate pairs of spacedpusher elements 310,- 312, 314, and 316 respectively. Shaft 320 isjournaled for rotation in any convenient manner.

From an examination of Fig. I which shows the completed coil C as it isissued from the automatic machine, it is clear that one coil side haspositioned thereon two tape elements T, while the opposite side of thecoil has only one. The coil side having the two tape elements hasissuing from it the trailing end C of the coil as Wound, while the coilside having only one tape element has issuing from it the leading end C,which is distinguished by a slight offset O, which is caused by theclamping elements on the movable block 92 as shown in Figs. XIV and XV.The coil is wound in the coil form F as shown in Fig. III with the sidehaving the two tape elements T facing toward the pusher elements 314 and316, or the front side of the machine, while the side having the singletape element faces toward the rear of the machine toward the elements310 and 312. There are then two tape elements controlled by the pusherelements 314 and 316 on the front side of the machine, while only asingle tape element is controlled by the pusher elements 310 and 312 onthe rear side. The essential elements of the machine for attaching eachof the tape elements T to the cornpleted coil C are substantially thesame for each element, irrespective of whether it is on the front orrear side of the machine, and, therefore, only the machine elementschamfered portion of the arm 390 into the sheave to form the lock forthe shaft 350 and the driver 34S for prevent ing any further relativemovement between the parts. The sheave 388 and the upper and lowerknurled drivers 348 are all atlixed to the shaft 350, while the gear 354is axed to the driver portion of the overrunning clutch 352, the drivenportion of which is also aixed to the shaft 350.

As the pin 400 on the rack 356 contacts the projection 398 on the arm390 to lock the elements together to prevent further forward movement ofthe tape end 356 as has been already described, further movement of thesliding head 362 is necessary in order that the foot 374 may advance tobreak its contactual relation with the tacky side of the tape as shownin Fig. XXVIII and as has been already described. Inasmuch as the rack356 is locked against movement by the pin 400 abutting against theprojection 398, further movement thereof is impossible, and theadditional movement of the sliding head 362 is allowed by the lostmotion connection 364 already referred to and shown in Fig. VIII. Thelost motion connection consists of a helical spring 402 fitted on anintegral cylindrical portion 404 of the rack member, the spring seatingagainst a shoulder 406 at the terminus of the rack and against adepending portion 408 of the sliding head 362, which is provided with asuitable aperture, through which the cylindrical portion 404 projectswith a sliding fit, being provided with lock nuts 410 on the distal endto limit the expansion of the spring 462. It is obvious that the spring402 will be compressed when the sliding head 362 is further advancedwith the occurrence of the abutting relation between the pin 400 and theprojection 398 already described. The cylindrical portion 434 will bedisplaced through the aperture of the depending portion 408, to allowlthe spring biased motion of the sliding head 362.

After the foot 374 has broken its contactual relation with the tackyside of the tape end 346 by continuing lto move forward after the tapeis locked by the action of the brake mechanism, as already described,the foot is lifted up from the tape and retreats to substantially itsinitial position, as is best seen in Fig. XXlX. The mechanism to obtainthe lifting up of the foot 374 is set in motion on the forward stroke ofthe whole lever as pivoted on the stud 376, so that, on its returnstroke, which is motivated by resilient means 412 attached on one end onpin 414 affixed to a portion of the sliding element 362 (to be furtherdescribed hereinafter) and anchored at the other end on a pin 416 on thehinged element 327, so that the sliding element 362 extends theresilient means 412 as it moves forward, which is assisted by the spring402 after the locking of the shaft 350 occurs. The return stroke of thesliding eiement 362 is brought about by the action of these threesprings.

Pins 414 also form pivots for arms 418, which lie substantially parallelto the links 372, the two being urged into contactual relation `byspring 37? as already described. In the preparatory phase of the tapingdevice, the arm 418 is inactive but it moves in and out with the slidingelement 362 in this phase even though it has no function to perform inso doing. The arm 418 is mounted on a separateslide 42), which has anabutment 422 which locks with the abutment 366 on the sliding element362 by a shoulder 424 as is best seen in Figs. HIV, XXV, and XXVI. Theseparts become active in the attachment phase as will be described later.

The slide 420 is provided with a T-shaped member 426, the arms ofthe Toverlying the arms 418 to form anchors for the springs 378 which urgethe arm 418 and the link 372 into cooperative relation as has beendescribed. The arm 418 is provided with a boss 428, as is best seen inFig. VIII, to give this contactual relation which is adapted to slidealong the outside of the link 372 when relative movement is had betweenthese members.

Both the upper and lower pair of links 372 and arms 418 are held ontheir respective pivot pins 376 and 414 by a bridge member 430 which islixedly attached to the hinged member 327, having four arms 432projecting outwardly to contact the upper and lower sides respectivelyof the pairs as is best shown in Figs. VIII and IX. The base of thebridge member 430 is slotted to slidably mount a pair of cam membersv433which are urged apart by a spring 434 seated in each cam member, so asto contact the cams with the upper and lower links 372 l0 s on the sideopposite from the arms 432, against which they bear on a slidablerelation as is best seen by 'comparing Figs. VIII and IX showing twodifferent positions of these elements. The relation between these camelements or members 433 and the links 372 provide the means whereby thefoot thereof is lifted up from the tacky side of the tape end 346 on thereturn stroke as shown in Fig. XXIX.

. The links 372 on the side opposite from that on which contact is madewith the arms 432 are provided with cam projections 436, which embodythree separate cam surfaces to cooperate with the cam members 433, whichalso has two cam surfaces. Referring now to Fig. VIII, these cooperatingcam surfaces on the links 372 and the members 433 are most clearly seenwith the lower link. At the beginning of the stroke of the link 372 inthe preparatory phase in which the tape element T is gotten ready forpositioning on the side of the coil C, which is lbeing wound by therotating coil form F during this phase, the forward cam surface 438 onthe projection 436 of the link is in contact with the lower cam surface440 of the member 433 as shown in Fig. VIII. As the link 372 is pushedtoward the slots 380 and 384, the member 433 is dis-l placed against thebias of the spring 434, so that the lower surface 442 of the member 433rides the upper surface of the projection 436, which continues until thefoot of `the link is beyond the coil slot 384 and cooperating with thedrop off 385 for the purpose of releasing the foot from the tacky sideof the tape as already described. It will be noted that the link has onits inner side a step 444 which cooperates with the bridge member 436under the influence of springs 378 to allow the foot to move over thedrop off 385 by being displaced toward it to assure a smooth release ofthe foot from the tacky tape side, which, if released by a straight linemotion of the foot, would place considerable tension on the tape in alongitudinal direction to give a sudden release to cause the tape tosnap back in the direction of the rollers 348 and give non-uniform tapeelements over the slot 384. With the foot of the link moving down theangularly arranged drop off 385, as allowed by the step 444, the tapewill be released from the at surface 374 rst, but contact between thefoot at its rear trailing edge 374:1 will still remain in cooperationwith the drop oi 385 with the tacky tape side, so that the tension onthe tape will be at a minimum and a smooth, steady release of the tapeend will be accomplished without snap backs, so that the release of thetape end will be substantially uniform over the coil slot 384, to assureuniform tape elements T as positioned on the sides of the coil C.

After the foot of the link 372 has been released from the tacky side ofthe tape, the cam projection 436 thereof has advanced with reference tothe member 433 to a position where the forward cam surface 446 of themember 433 drops behind the rear cam surface 448 of the projection 436under the influence of the spring 434. At this point, the link 372 is inits most advanced position and now begins to move backward to itsoriginal position,

and, in so doing, the contactual relation between cam surfaces 446 and448 on the member 433 and the link 372 respectively, raise the linkabout its pivot 376 and its foot and also theinactive link 418, againstthe bias of springs 378 to clear the tape in its retreat as is'ibestshown in Fig. XXIX. When the link 372 has moved to substantially itsoriginal position, the forward cam surface 438 on the link again dropsbehind the lower cam surface 440 of the member 433 to prepare theelements for a new cycle of operation. With the drop of the link 372,its foot with its plane surface 374, again contacts the tacky side ofthe tape just behind the cutter slot 380, where it firmly holds the tapeduring the cutting operation by the cutter 382 as will be furtherdescribed hereinafter.

The return of the link 372 to its original position, as shown in Fig.XXIX, with the tape end 346 extending beyond the wire slot 384, closesthe preparatory phase with about 108 of rotation of the countershaft asalready described. Now the attachment phase begins wherein the tapeelements T are aixed to the sides of the coil C, which at 108 ofrotation Vis fully wound and ready for the attachment of the tapeelements. It is at this point that the hinged member 327, carrying thethree tape attaching mechanisms, is moved into cooperative relation withthe winding form F by the mechanism 35 shown yin Fig. V, alreadydescribed here'nbefo're. i

The. samrtl, en ;the.,;drurn; 6.7 .beainsfto .more-.the hin'ssdplate3,27.: a'tabcut lOfxof rotatiaaof thercounter. I Shaft fil asi Showninthsraph .entitled f-TapingfFrame.; in Eig-.XXXXIL At approximately130,71-of rotation,

the.hing e `clmemberA 327 ,is moved its maximum `distance so as toplacethe exposed coil sides in the; slotsinto4 ther slots 384, over.which extend-the free ;ends of .thel tapes 346 with the tacky tapesides embracingthe,coil-2 Sideias. is bsstseeufin Figi. XXX. :It will benoted that the coil sides-depress the .tapesdownintothe slots'Sd-gasshown, yvhichflcauses thejendof the tape. to ,move out-,n.-Vv

wardly awayfrornthe drop olf and-projecbdirectly out ,from thev coilsidewhere'it; isin a position tocoopen,y atewith the tingen of thelinlryor leven-41S as wilhbe.;Y

described hereinafter.

cooperative relationlwiththewinding.form-F, the -slide H which,carriesnthe4 gnide G endgyirev-,cuttershayealso .U been. ,moving .inteCooperatwe. relatrorrwuh. the. madura form F through lthe actionfpfthecam @has isiclearly, Shown infie.- XVIII- .T he action of these;

elementsis substantiallythe same as described-.in the-.

aforementioned Weber patent yand they will; not be fur,-

therdescribed. The `fingen5:3,..fo11removaly of thenf ished coilV fromthe',windingform F2, is actuated Aat theA same time by cam 85aon the endof the drum. .j67 by a suitable pivoted linkage'moving aboutpivots 85h-,as

shown in Fig. XVIi'L thengerzbeing,springretracted if desired.. Thetimed relationof thenger 3 5 isshown by c the/graph entitled CoilEiectQnFinger. .in Fig- XXXXH,

while that of the head H is shown.bythe graph` entitledl y I "WireCutter in the same gure,

Thewwire cutter is actuated'to sever-.the trailing-endof the coil; atapproxirnately..13:5" of rotationl of the ,count ter-shaft 4,.b y having,the pindonthe movable element 448 of the cutter moyedown an oblique slotof arplate, y against vthe bias ,of a spring.Thegutterswact to shear;,5 thewiresto eut-the-lfullywwoundroilfreefrom the continuousstrands, z;h

The notch N iin-the guide G has already gathered thestrands together andpushedv therrninto the )awsy of Athe gripping mechanisrnwhich,isthenactuated by the -bell,-V`

cranli`99 to prot/idea new grip on the leading endsof the ,wiresfor the,next-consecutive -coil to be wound. The actuation of thismechanisrnl,has already been described and, occurs at approximately l55 ofrotation.

of the countershaft 41. `This prepares the wires forlthemL beginning ofa new winding cycle, but before `the comnleted coil fcan be removed ,frorn' thevwindingform E,

the tape elements must be attached to its sides, as willv now bedescribed.

As hasV hereinbefore been described-,the hinged element 327, carryingthe taping vmechanism,,has been-moved;` into full cooperationwith y thecoil forrn lF after 140,9, of I rotation` of the countershaftksubstantially,las shown in l Fis/XXX and immediatelythereafter-thetapescutter f housed inslot 380 is actuated to sever thetape elements T from the free ends 346 of the tape. .The details of the1 tape cutter are shown in Figs. XXXVXXXVI, XXXVII,

and XXXVIILand further details of the actuatingmech,- anisiniarc shownin Figs. XXIV, XXV,and- XXVI.

of the movement of the hingedelernent2927` by thefrrnech :mism shown .inFig;- V on the actuating"mechanismof Referring first to theactuatingmechanism, theueffect relationbeing shown in Fig. Vl withthe pusherld,contacting abutment-366. 'This driving relation is activefrorn about`220 of rotation of theconntershaftv 41 throughpL mo and then toapproximately-l00of thenext con,-v secutive turn as isV best seen Abyreferring to thejgraphs:

shown in Fig.'XXXXII. At 100 of rotation, thel'ringedl element 327 ismovedv into actiyerelationwith the windfing form F to bring about anactiveA driving relation be, tweenrpusher rod 316 and abutment Z2-ontheslide 420` and also 'moves the elements in alignment which actuatesythe tape cutter 352. as shown in Figs. XXXVI',

and XXXtIiUwhich will Ynowl be describe4 l,

is i'eaiy attachee, i1

erativegrelation with thepusher elementilld to agcooperno activefunction' to fulll in thisphase.

, the tapeebehindlthe-Islot st'wher'eby thegtape ,cutter 3823i thehiasof springdin aclockwisedireetionto incre-theI cutterZto` itsretractedposition.- .against .a stop 462; The cutter, .382 is positionedin the 4Slot; daas already def scribed-just behind :the coil s lotlitdVlas is best seenin 1 FigsHVIII, XXVII to XXXIII inclusive.v The positionof Athe angle @S4-'hemelen thetwo tape ends 346 is besta 1- seen inFigyVIIIfit/,hieh alsogtshows'theireegendrof the lever 456 between thetwo rolls of tape 349. Thepivot pointA 4531sshownin lig.,\ ZII; as .aiPart of -theehinged--.

theY general arrangernentof the lever Stijn thegtaping y mechanism. 4;4`

During thepreparatory phase of the.iapingrnechanism that is, before1,08? -of rotation --of thevlcountershaft 41,:V ,thefcutter y332 isnotin ,aV positiongto b e :actuatedninasf much as the endof the-,lever456;;is, positioned rabovethe arm 324 with its kpusher;*elements.314andri' -in this phase as is best seen in gFigrIll..V It isonlyaftertthely. hinged element has been mor/ ed YintoA cooperativerela-w .tionwiththewinding formi, as already described;andfgx.y

against its adjustable stop 464 (Fig. Il.l), that'theendv of thellever456, makes contactual'relation with cam .blocka- 46o-Figs. XXXVI toXXXVIII inclusive positioned on an .f s; upwardly projecting portion 46S.of the, arm 4324 aabovew:v

stheglevel of the pusher elementll, Vby a pivotedzlug 47ii, attached bypin 472'on its end, the lug 47) being t biased-by spring 474againstashoulder 476 on theendr.v of the lever. When the lug 47@ is' urged in aclockwise direction about its pivot by the camblock 466;'beng v ,vinoyedinwardly bythe, arn1g324, it locks against. the-f.

about 142. of rotation of theycountershaft 41 as is seen'V by referringto the rst graphjentitledV Tape Feed and.. Tape Wrap in Fig. XXXXII.

On the return stroke of the arm,324,1116carnblock'r 466; rotates the`lug 1470 in a clockwisedirectionaboutf.

:its pivot 472 against thebias of the springf474,.s0:a,s

to allow easypassagerthereof, for the next cycle of operation as shownin Fig. XXXVIII. After the cuttingof ,y the jtape ,element T, the cutter382 is returnedvto its slot. ;v 38tl1by the spring 460 as is wellunderstood. A

Returning now to the second inwardstroke of the;arm; 324g1as is broughtabout by ytheisecondlobe o n the cama: 304(Fig". `VI)'which is activebetween ,140 ,to ZOOy-of rotation' of the countershaft4 41, theaction oftherflrstrz; lobe 'of the cam having been already; described intron-5;;4

.nection with the preparatory phase,` it willbe noted that;

in this;l phase, .the Vtape elementis .Severed (as` alreadyge"described) 'and attached to thecoil side, ,the coil-havingLt.; alreadyvbeen wound,eand thetaping mechanism.moved lntocooperation with thewindingforrn as, described.; The'. g movement of the tapingA mechanismby theactionof the hingedf element 3,27, shifts the mechanism frornitscoop.

ativerelation. with the ,pusherj element: 3.16; both posif tionedon thearm 324' ,whichrnakestwo inward: stro-kes per .revolutionof thecountershaft- 41 as already described. In the 'early phase of thesecondstroke-of the arrnf324, the tape ,cutter 382` is actuated,ythenthe ,pushergld makesfcontact with the abutment 422 on the end-of theslide it'which parallels the rst slidelelementl 3,62; Thevslidefelernent3t52 actuates the link 372, whilethe second y. shdeidlt)actuates the linkdlpositioned in parallel jrelaf f tion with `the footedlink 372, whose functions have alreadyw" beenr described. 'The twoslides 362. and 420 are locked together during the first inward strokeinitiated by the f pusherelement 314, the slide 420 and its link 418-havng During the' ,i second inward stroke "of the larrn 324, theslide element 3622' isi inactive and does not move, and theonlyfunction- 1t fulillsfis-'t'o holdthejfoot of th'eglinhjlagainst-.the snrfaceffrmrwith fits face- 374 against the i t acky.,side4of x is aidedf'daring-theeuttingoperation by havingthejtape.endt--irm'lyheld in positioneover the slot-380.. "The'slide 362=1i1sbiasedfto inactive-:positionf'by "spring 4.02? (Figi j` fVIIIf); L

When the tape cutter 382 is actuated by the initial movement of the arm324 in this phase to cut the tape as shown in Fig. XXXI, the end of thetape element T just cut will move out from the plane of the surface 370to align itself with approximately the plane of the side of the coilslot 384 as is clearly shown in the drawing. This makes it available forcooperation with the arcuate nger 478 on the end of the link 418, theinward movement of which toward the coil side begins after thecompletion of the cutting of the tape element by the pusher elementthrusting against the abutment 422 to move the slide away from theshoulder 424 against the bias of the springs 412, which also moves thelink 418 pivoted to the slide. At first, the finger 478 will ride downthe forward face of the footed link 372l under the bias of springs 378until abutment 428 (Fig. XXX) on the inner side of the link 418 rests onthe outer side of the inactive link 372, along which it slides toprevent possible interference with the slots 380 and 384 housing thecutter blade and coil side respectively. As the arcuate end of thefinger 478 moves inwardly along approximately the plane of the surface370, it picks up th severed end of the tape element T, and pushes thetacky side thereof in contact with the coil side as shown in Fig. XXXII,this end of the tape element being long enough to extend completelyacross the coil side and cause the two tacky sides of the ends of thetape element to make contact. This places the tacky side of tape to thetacky side of tape on the two ends of the tape element T, the contactualarea being relatively small as shown in Fig. XXXIV but being suicientlylarge to give a firm grip to the ends of the embracing tape element. Thenger then continues to move inwardly to overrun the tacky side of thetape element on its opposite end as shown in Fig. XXXII. The springinessof the tape end pulls the nontacky side away from the surface 385, sothat it extends upwardly` to allow the finger 478 to get behind it, sothat on the return stroke of the linger, the tacky side remainingexposed is folded back over to overlie the rst end as is shown in Fig.XXXIII. Just as the finger 478 moves across the last portion of the coilside, the winding form F is opened with the ejector finger 85 pullingthe coil from the form (Fig. XXIII), so that a slight turning ofthe coilis accomplished which tends to give extra pressure on the last end ofthe tape to be attached, to thereby improve its contact with the outerside of the tape element for greater strength in holding the coil inshape after its removal from the machine. The slide 42) returns to restagainst the shoulder 424 and the hinged element 327 is retracted to itsoriginal position to begin the preparatory phase for the next coil.

Each of the three separate mechanisms for attaching the three tapeelements T to the coil sides follow the same procedure, in the same way.

The coil winding form F is opened by the cam path 68 (Fig. IV), theslide H mounting the guide G and the wire cutters are returned toretarded position and the ejector finger 85 pulls the completed coilfrom the form, so that it drops by gravity into a hopper below thewinding form. The coil winding form F begins to close again atapproximately 300 of rotation of the countershaft and is closed justbefore 360 of rotation, so that a new cycle of winding may begin. Theleading end of the wire strands W are locked in the head 92 to form theleading end of the next consecutive coil to be wound. The machine isautomatic and suitable for continuous operation.

The tape used with the hereinbefore described machine is known as ScotchElectrical tape having a lat paper backing with an adhesive which ispressure sensitive, thermally reactive and incorporating a thermallysetting resin. After the taped coils are positioned in the slots of agenerator armature, the assembly is dipped in varnish and heat-treated,so that the tape used must have the characteristics mentioned to be usedsuccessfully for the intended purpose.

It is to be understood that the above detailed description of thepresent invention is intended to disclose an embodiment thereof to thoseskilled in the art, but that the invention is not to be construed aslimited in its application to the details of construction andarrangement of parts illustrated in the accompanying drawings, since theinvention is capable of being practiced and carried out in various wayswithout departing from the spirit of the invention. The language used inthe specification relating to the operation and function of the elementsof the invention is employed for purposes of description and not oflimitation, and it is not intended to limit the scope of the followingclaims beyond the requirements of the prior art.

What is claimed:

l. In a device of the class described, an intermittently rotatablewinding form separable in a plane transverse of the axis of rotation forwinding coils from continuous strands of wire, slots in the winding formto expose a portion of the coil sides, a tape applicator including aslot conformed to compress the coil sides when applied thereto in thewinding form slots when the winding form is stationary, means toposition the end of the continuous strand of tape having a tacky sideover the slot of the tape applicator by contacting the tacky side of thetape, means to cause relative movement between the winding form and thetape applicator whereby the coil side is compressed together in the slotand pressed against the tacky side of the tape element positioned overthe slot when the winding form is stationary, means to cut the tapeelement from the continuous strand, means for folding the outwardlyextending ends of the tape element over each other with end portions ofthe tacky side in contact with each other to embrace the coil side,means for opening the winding form, means for removing the completedcoil with the tape element attached thereto from the winding-form, andmeans for automatically actuating said elements in timed relation forcontinuous cyclic operation of the device.

2. In a device of the class described, an intermittently rotatablewinding form for winding coils from continuous strands of wire, slotmeans in the winding form to expose a portion of a fully-wound coilside, tape applicator means including a slot formed to compress the coilside when the slot is applied thereto in the winding form slot meanswhen the winding form is stationary, means to position a tacky tapeelement over the slot of the tape applicator means, means to causerelative motion between the stationary winding form and the tapeapplicator means whereby the coil side is compressed into the slotagainst the tacky side of the tape element which thereafter extendsoutwardly therefrom, means for folding the outwardly extending ends ofthe tape element over the coil side with a portion of the tacky tapesides in contact and over each other to embrace the coil side, and meansfor automatically operating the machine elements in timed relation forcyclic operation.

3. In a device of the class described, an intermittently rotatablewinding form separable in a plane transverse of the axis of rotation forwinding coils from continuous strands of wire, slot means in the windingform to expose the coil sides, a tape applicator including a slot formedto compress the exposed coil side when the slot is applied thereto, whenthe winding form is stationary, means to position a tape element overthe slot of the tape applicator, driving means for the winding form andthe applicator during a preparatory phase wherein the coil is wound fromthe continuous strands of wire and the tape element is positioned overthe slot, means to cause relative motion between the coil form and thetape applicator whereby the exposed coil side of the completely-woundcoil is pressed into the slot against the exposed tacky side of the tapeelement positioned thereover, means for folding the ends of the tapeelement over each other to embrace the coil side, and means to operatethe elements of the device in timed relation for continuous cyclicoperation.

4. The device defined in claim 3 further characterized by a hingedconstruction of the tape applicator which moves into cooperativerelation with the relatively stationary coil winding form to attach thetape element to the side of the completely-Wound coil positioned in thewinding form.

5. The device defined in claim 1 further characterized by areciprocating means cooperating with the tacky side of the tape toposition the end of the continuous strand of tape over the slot of thetape applicator.

6. The device defined inV claim 1 further characterized by areciprocating finger cooperating with the outwardly extending ends ofthe tape element whereby they are folded over each other to embrace theexposed side of a completely-wound coil. e Y

7. The device dened in claim 1 further characterized by a drivenrotatable means cooperating with a reciprocating means to control thelength of the tape element and nomma-1e;

to positiomtheeend of the continuousfstrandzof ltapeovergel:

theislot-jof thentapezapplicato;s,.-,

8. Tnecdevicegdefined .in claim :1; furtherrcharacterized .1, by adriven rotatableelemerrteto advanceitheiendof the 1 continuous strand oftape over the slot by cooperating.,-

with a reciprocating element contacting,ftheitaclyside of tlieztapmen'd;with..l"ekingmeans 'for therotatmgiele mentto allow; locking cf .thecontinuous strand of ,tapenty to contrnlzthe length. of theftapedelement and .to release theueciprccatingelementzfrom Athe tacky side .ofthe tape t end:

9. In a-device of thejclassf.descrbed,.zan intermittentlyrotatablerwinding'formlseparable'n a planetransversefof Y the; =,ax1s.ofrotation for wlnding '.co1ls.v fromcontmuousl strands ofw1re,:,slot;means 1n the windingfformto expose t elementfover-:thes1ot;of the` tape,applicaton.drivingmeans forthe windingform and.theapplicator during apreparaeaY tory:phase;wher.ein thegcoilzisWound'rfrom the continuous strand of .wire and the tapetelementzispositionedv over thelotozmeansnto 'causeifrelativefmotion between the:-`coil :formiandttheape apprlicatortwhereby the exposed coilzsideofthe:completelywound coilwhen thezwinding z' 1 formxis stationary; ispressedfintolthe slotagainstthe".` exposed=tacky.'fside;ofthetape,.elementpositioned .there-i 0ver,':;means to `cutrzthetapeizelenlentto predetermined..` t

length, means for folding the ends of the tape. element oveneadrsothertoembrace the Jcoil side, means;to ejectthelaeoilxftomtthetswndngzformfandautomatic rneansto 1:

operate'vthenelements vof thez'devicezin timed relationtfor;

continuousfcyclic: operation.

l0.iIfn avdevicelof the; classidescribed,an intermittentlyi tapeV,applicator-includ-ing af slot `formed-to compresstheexposedcoil.sideLWhenwtheislot is applied Ytheetoymeans''A to positionaf taperelementkoverfthef'slotlof the Vtape applicatorfrom laAcontinuous strand 'of tapegdriving' means for the winding form: andlttie applicator during? 'apreparatory f d phase wl1erein*.fthe"coi1 iswound IJfromithev` continuous strands of wire'and-the tape =e1en1entffispositioned 'over lthe slot -frorn =the-continuousstrand of tape,meanshto form andthe -tapeapplicatortyvheeby-thef ezftp'osedv` Coil sideof the completely-Wound :"eoildis pressedl--nto fthe slot- 1 against:ythe exposedtacky sidefof thevftapejelement'posi- ?.tioned -thereover,meansto eutf the tape lelenienteto pre -Y determined 1length;meansfforiifoldig the==ends of the tape yelement overAeachw'otherlfto `embrace-thefcoil"side, l means to eject the tap'edcoilfrom-"fthef stationary winding form, and` automatic'. means toactuateithefelementsof the 'v device in timeLl-relatiomfor continuousicyclic :operation: f

References Ctefinfthelleof this'ipatent- UNITED STATES; PATENTS STI f1,401,519 Dec.f'27,"1921-'. 1,797,173 Matson Mar? l17,:1931- 1,927,708Pieczentkowsk- Sept. 19,' 1933 1,934,471 Kerri- NOW' 7, 1933 1,946,717Fel-6913,' 1934 'Y :1,949,544 Mar,v 6, '-1934 1,981,940 Collins'ffeNo'v.f27,f1934` 2,154,792 Weben...` Apr.- r'18,11939 '7 2,246,608 TaylorJune24,51941 2,367,086 r' Barry Jan'.44 9, 19451- 5,2,445-,109L FergusonJu1y113, 1948#v 2,569,513 Burge Oct-Z, 195'l1 2,624,374 Burge f z.Ianjf, 1953**

